On the Microbt Whatsminer M31 hash board, the LDO powering circuit is very important. Each group of its domains will correspond to an LDO 1.8V, and the 0.9V is provided by two resistors in series. 1.8V and 0.9V are both supplied to the ASIC chips in the corresponding domain. It should be noted that the powering method of the LDO chips in the last nine domains is different from other domains. This video will explain in detail the LDO powering circuit of this hash board and how to measure the correct voltage.
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